Huels Aktiengesellschaft

Other

Degussa Aktiengesellschaft

Frank Steding

Burkhard Standke

Jaroslaw Monkiewicz

Michael Horn

Claus-Dietrich Seiler

Franz Nierlich

Albert-Johannes Frings

Gerda Grund

Anton Schoengen

Hans-Guenther Srebny

Frank Kropfgans

Hermann-Josef Korte

Uwe Dittrich

Bernd Nowitzki

Alfred Oberholz

Gerhard Franz

Thomas Jostmann

John Kashnitz

Hans-G&uuml;nther Srebny

Stefan Jelko

Hans-Joachim K&ouml;tzsch

Reinhard Mueller

Apparatus and process for preparing substantially halogen-free trialkoxysilanes

Continuous method of manufacturing chlorine-free tetraalkoxysilanes

The present invention relates to a process for preparing organosilicon compounds which contain at least one H.sub.2 C.dbd.CH--Si-group, by reacting an organosilicon compound which contains at least one H--Si-group with acetylene in a gas/liquid phase in the presence of at least one addition catalyst and extracting the organosilicon compound which contains at least one H.sub.2 C.dbd.H--Si-group from the reaction mixture, wherein an organosilicon compound which contains at least one H--Si-group, the acetylene, which is used in stoichiometric excess, and a substantially inert liquid phase is brought into very intimate contact in a jet tube loop reactor in the presence of a catalyst, and the organosilicon compound which contains at least one H.sub.2 C.dbd.CH--Si-group is subsequently extracted from the reaction mixture and the excess acetylene is recycled into the process.

Process for preparing vinylated organosilicon compounds

A process is provided for the oxidation of p-xylene and methyl p-tolulate with oxygen-containing gases in the Witten-Hercules process for preparing dimetyl terephthalate in at least two sequentially arranged stages and in the presence of a catalyst, wherein the process involves oxidizing p-xylene and methyl p-toluate with oxygen containing gases in at least two sequential stages in the presence of a catalyst, wherein the at least two sequential stages include at least one p-xylene rich stage and at least one methyl p-toluate rich stage, wherein at least one of the following steps (a) and (b) occurs:

Oxidation in the Witten-Hercules process for preparing dimethyl

Carrying out a chemical reaction in a reaction distillation column on an inorganic catalyst in the form of a column packing material which is maintained above the column bottom permits the use of high reaction temperatures and the easy removal or replacement of inactivated catalyst.

Method of carrying out chemical reactions in reaction distillation

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Marl, Germany

Frank Steding